1. Examination should contain standard scans, bone scans and guide side scan in three separate series.

2. The slice should be as thin as possible. Layer thickness should be constant! Not as in standard CT where layer thickness close to the skull base is e.g. 0.625 and above is 1.3 or more. Here all slices MUST be of the same thickness. Optimal is 0.625 but 1 or 1.3 in case of older CT scanners is also acceptable. CT MUST BE standard protocol – and not SPIRAL (or helical) one. Spiral (continuous) examination is useless for cranioplasty needs.

3. Gantry angle should be set to 0 (zero). Without any tilt – slice position should be perpendicular to long axis of patient’s body.

4. Examined area should contain whole head (not only area of bone defect) – the best is examination from neck to air over the top of the head.

5. All files should be converted to DICOM files in three series – first files 1 to xxx of bone scans, second 1 to xxx of standard scans and third – guide side scan. Conversion should be done with eFilm PACS utility. Files should be placed in three adequate catalogs. Files from catalogs should be viewable by any usual DICOM viewer (as eFilm, DICOM works or any other).

6 . If possible guide screen save should be attached (with layer position) – see sample.

7. Usual X-ray examination would be an useful addition – side view, frontal view (p-a) and Towne’s view, all saved as DICOMs.

8. Photographic images of the patient are also welcomed – side, en face and ¾.

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